[time-nuts] Even Seconds Pulse option (1PP2S), HP 58503B

[Neville Michie]

If you have a square wave at .5PPS and you connect a large series capacitor to the coil of a quartz clock
(less battery) you get alternating seconds pulses drive to an analogue dial.
50 ohms will easily drive the about 1k coil.
Cheap quartz clocks make good slaves.
cheers,
Neville Michie

> On 29 Sep 2019, at 22:56, Gregory Beat via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> A new resident arrived at the “Time Cave” this weekend, the HP/Symmetricom 58503B.  Just the plain front panel (4 LEDs) model, without Option 1 (VFD clock display).
> Acquired in USA, cheaper than current Asian exporter.
> https://accusrc.com/uploads/datasheets/4975_58503b.pdf
> 
> Supposedly stored in a closet since 2010 (verified by its diagnostic logs), the unit only had 2,000 hours of operation.
> Today, it happily has a GPS Lock and is currently “re-learning” where the 1 PPS and 10 MHz outputs wandered (taming Lazarus).
> —
> One surprise, it has Option 2 (1PP2S) installed on its Rear Panel.
> 
> Option 002 : 1 PP2S (One-Pulse-Per-Two-Seconds) connector for outputting a pulse every other second, synchronized to the even seconds in GPS time. 
> Pulses occur on even-numbered seconds (i.e., 2 seconds, 4 seconds, etc.).
> ===
> QUESTION: 
> What Specific Applications would use this 1PP2S output regularly??
> 
> greg
> 
> Sent from iPhone 6s
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